Sampling Procedure for Establishing Criteria for Sea Urchin (<i>Loxechinus albus</i>) Proportion under the Legal Minimum Length of landings

Sea urchin (<i>Loxechinus albus</i>) is one of the most economically important species in the northeast of Chilean Patagonia, forming part of the highly diverse benthic community. This resource is being harvested under selective fishing pressure, which suppresses growth rates. In respons...

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Main Authors: Gustavo Di Giorgi, Marvin Querales, Javier E. Contreras-Reyes, Danilo Pereira, Carola Hernández-Santoro
Format: Article
Language:English
Published: MDPI AG 2020-02-01
Series:Journal of Marine Science and Engineering
Subjects:
Online Access:https://www.mdpi.com/2077-1312/8/2/102
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spelling doaj-89fe607e15c3472b9fb76e583835a7fb2021-04-02T11:55:02ZengMDPI AGJournal of Marine Science and Engineering2077-13122020-02-018210210.3390/jmse8020102jmse8020102Sampling Procedure for Establishing Criteria for Sea Urchin (<i>Loxechinus albus</i>) Proportion under the Legal Minimum Length of landingsGustavo Di Giorgi0Marvin Querales1Javier E. Contreras-Reyes2Danilo Pereira3Carola Hernández-Santoro4Instituto de Estadística, Facultad de Ciencias, Universidad de Valparaíso, Valparaíso 2360102, ChileInstituto de Estadística, Facultad de Ciencias, Universidad de Valparaíso, Valparaíso 2360102, ChileDepartamento de Estadística, Facultad de Ciencias, Universidad del Bío-Bío, Concepción 4081112, ChileServicio Nacional de Pesca y Acuicultura (SERNAPESCA), Valparaíso 2340159, ChileDivisión de Investigación Pesquera, Instituto de Fomento Pesquero, Valparaíso 2361827, ChileSea urchin (<i>Loxechinus albus</i>) is one of the most economically important species in the northeast of Chilean Patagonia, forming part of the highly diverse benthic community. This resource is being harvested under selective fishing pressure, which suppresses growth rates. In response, the National Standards Institute established Regulation 44 as a quality control measure, based on a sampling approach considering the percentage of sea urchin under the minimum legal size (UMLS) through an acceptance sampling plan. In 2019, the Chilean Undersecretary of Fisheries and Aquaculture (SUBPESCA), under Exempt Resolution No. 910, ruled that any vessel that landed 15% with sea urchin of 6.5 cm UMLS of the total catch weight will be sanctioned. In this paper, a sampling design is presented to establish criteria regarding compliance with this provision. The plan provides a statistical methodology for the evaluation of the percentage of UMLS sea urchin, which corroborates and certifies the current legislation that sanctions and fines the capture of sea urchin that does not comply with UMLS values outlined in Regulation 44. Assuming a systematic sampling plan and under assumed UMLS values of 6.0, 6.5, and 7.0 cm, it is determined that 15% of total landings (margin of tolerance) of sea urchin under 6.5 cm is the optimal level. Thus, a correct specification of the UMLS allows protecting the most vulnerable fraction of the population from overexploitation for growth.https://www.mdpi.com/2077-1312/8/2/102sea urchinsampling procedureminimum legal lengthextractionlanding portchilean patagonia
collection DOAJ
language English
format Article
sources DOAJ
author Gustavo Di Giorgi
Marvin Querales
Javier E. Contreras-Reyes
Danilo Pereira
Carola Hernández-Santoro
spellingShingle Gustavo Di Giorgi
Marvin Querales
Javier E. Contreras-Reyes
Danilo Pereira
Carola Hernández-Santoro
Sampling Procedure for Establishing Criteria for Sea Urchin (<i>Loxechinus albus</i>) Proportion under the Legal Minimum Length of landings
Journal of Marine Science and Engineering
sea urchin
sampling procedure
minimum legal length
extraction
landing port
chilean patagonia
author_facet Gustavo Di Giorgi
Marvin Querales
Javier E. Contreras-Reyes
Danilo Pereira
Carola Hernández-Santoro
author_sort Gustavo Di Giorgi
title Sampling Procedure for Establishing Criteria for Sea Urchin (<i>Loxechinus albus</i>) Proportion under the Legal Minimum Length of landings
title_short Sampling Procedure for Establishing Criteria for Sea Urchin (<i>Loxechinus albus</i>) Proportion under the Legal Minimum Length of landings
title_full Sampling Procedure for Establishing Criteria for Sea Urchin (<i>Loxechinus albus</i>) Proportion under the Legal Minimum Length of landings
title_fullStr Sampling Procedure for Establishing Criteria for Sea Urchin (<i>Loxechinus albus</i>) Proportion under the Legal Minimum Length of landings
title_full_unstemmed Sampling Procedure for Establishing Criteria for Sea Urchin (<i>Loxechinus albus</i>) Proportion under the Legal Minimum Length of landings
title_sort sampling procedure for establishing criteria for sea urchin (<i>loxechinus albus</i>) proportion under the legal minimum length of landings
publisher MDPI AG
series Journal of Marine Science and Engineering
issn 2077-1312
publishDate 2020-02-01
description Sea urchin (<i>Loxechinus albus</i>) is one of the most economically important species in the northeast of Chilean Patagonia, forming part of the highly diverse benthic community. This resource is being harvested under selective fishing pressure, which suppresses growth rates. In response, the National Standards Institute established Regulation 44 as a quality control measure, based on a sampling approach considering the percentage of sea urchin under the minimum legal size (UMLS) through an acceptance sampling plan. In 2019, the Chilean Undersecretary of Fisheries and Aquaculture (SUBPESCA), under Exempt Resolution No. 910, ruled that any vessel that landed 15% with sea urchin of 6.5 cm UMLS of the total catch weight will be sanctioned. In this paper, a sampling design is presented to establish criteria regarding compliance with this provision. The plan provides a statistical methodology for the evaluation of the percentage of UMLS sea urchin, which corroborates and certifies the current legislation that sanctions and fines the capture of sea urchin that does not comply with UMLS values outlined in Regulation 44. Assuming a systematic sampling plan and under assumed UMLS values of 6.0, 6.5, and 7.0 cm, it is determined that 15% of total landings (margin of tolerance) of sea urchin under 6.5 cm is the optimal level. Thus, a correct specification of the UMLS allows protecting the most vulnerable fraction of the population from overexploitation for growth.
topic sea urchin
sampling procedure
minimum legal length
extraction
landing port
chilean patagonia
url https://www.mdpi.com/2077-1312/8/2/102
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